johnson



a. w. JOHNSON.

PIGKING SCREEN.

APPLICATION FlLED-MAR.13, 1922.

Patented Oct. 10,1922,

3 SHEETS-SHEET 1.

R. W. JQHNSWWZ ,PICKING SCREEN.

APPLICATION FILED mm. 13, 1922.

1,431, 7,, Patented Oct. 10,1922.

3 SHEETSSHEET 2.

R. W. JOHNSON.

PICKING SCREEN.

APPLICATION FILED MAR. 13. 1922.

Patented Oct. 10,1922.

3 SHEETS-SHE 3.

uaMo 4 7 Patented Oct. 10, 1922 UNITED STATES PATENT OFFICE.

ROBERT WILLIAM: JOHN'SGN, 0F PITTSBURGH. PENNSYLVANIA, ASSIGNOR TO ROBERTS AND SCHAEFER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PICKING SCREEN.

Application filed March l3, 1922. Serial No. 543,143.

To all w 7mm 2'25 may canoe m:

Be it known that I, Bonnier TVILLIAML JoHNsoN, a citizen of the United States, re siding at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvementin Picking Screens, of which the following is a specification.

My invention relates to a screening and picking device, and particularly for a coalhandlin device which is adapted to screen and gra e coal and to permit various grades of the coal to be picked during the grading and the conveying consequent thereto. Other objects of my invention will appear from time to time in the course of the specification.

I illustrate my invention more or less diagrammatically in the accompanying drawings, wherein:

Fig. 1 is a plan view of the screen and picking table.

Fig. 2 is a section on the line 22 of Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig. 2;

Fig. i is an enlarged side view, with parts in section, of the central portion of the device;

Fig. 5 is a view of the actuatmg means, and Y Fig. 6 is a section on the line 6-6 of Fig. 1.

Like parts are illustrated by like symbols throughout the drawings and spech'ications.

A is any suitable supporting struct'ln'e having thereon the track or tracks A and being supported, for example, by the uprights A over a plurality of railroad tracks, which lie preferably at right angles to the working axis of the screen.

'13 is the lower deck of a balanced reciprocating screen which is supported on the tracks A as by the rollers B It hasa closed bottom, B which is broken at various points by any suitable removable gates, B B and B which overlie, respectively, the delivery chutes B, B and B The deck B terminates in an inclined chute 13 adapted to deliver, for example, to any suitable conveying means D or directly to the railroad car Overlying the deck B, and ada 'ited to be reciprocated in opposition thereto, or in alternation therewith, is the upper deck U, mounted, for example, on the roller C on the brackets C The deck C has a bottom C broken by the screen section C Beyond this section is a gate C overlying the gate B in the lower deck. Above the level C is the upper level D, which is broken by a screen section D beyond which is a second closed section D which terminates in a gate D overlying the gates C and B Beyond such gate is the closed section D which terminates in an inclined section D down which material may pass to the section D, which is a continuation of or at the same level as the sections U and C This section is, in turn, broken by a gate D overlying the gate B in the lower deck. B terminates in a feed or chute D which leads down to the end of the lower deck B On the deck C beyond the gate C is a V-shaped battle E, the point of the V facing toward the stream of material as it passes from right to left, as shown in Figs. 1 and 2. This bailiev deflects the material passing along 0 to a pair of lateral conveyors E and E which lie on either side of the upper deck C and are supported upon the lower deck or by any suitable frame connection. E and E are each broken midway of their course by screen sections E E shown in detailin Fig. 4;, and by the gates E E, all three of which overlie a hopper E from the bottom of which are chutes E E lead ing to the discharge chutes B B respectively. The material may be passed down one or the other, under control or" the swinging gate E or any other suitable means. At their lower ends E and E incline toward the central deck and their inturned ends E E feed material to the lower deck B adj acent its end, or to C.

Secured to and abovethe upper deck G in any suitable manner is a refuse trough, comprising an initial single section F which inclines'to, the right or left as'at F adjacent the balfie E and the upper ends of the troughs E E The section F continues along one of such troughs, while the second section, F parallels the other trough E these two sections converging as at F to join the single disposal section F Material is fed into the whole device in any suitable manner, as for example through the chute G. .The two decks are reciprocated on the horizontal plane in opposition to each other, as for example through the rotating shaft H, the eccentrics H 11 thereupon, and the pitman H H securedto the upper and lower decks, respectively. 7

Itwill be realized that while I have illustrated a working device, the details thereof must be taken largely diagrammatically, and many changes might be made in thenumber, shape, design, size and disposition of parts without departingfromthe spirit of my invention. I

The "use-and operation of my invention are as follows:

AaymiXed material, and preferably runofathe-mine coal, is fed upon the top deck or level, as shown in? Fig.1. The rotationof thedriving shaft andthe eccentrics there upon gives an irregular conveyingmotion, which-need not here be described;theresult being thatthematerial-on the scre'enassembly passes from right to left, as shown inFigs. 1 and 2. If, for example, run-ofthe-mine coal, of various and irregular sizes, is fed tothe screen, it passes first over the screen D in the upper level D. This is preferablya large meslr screernfor example of 3 inch mesh.f All sizes of?) inch pass thereover, whileanythingless than 3 inches drops through upon the screen C This screen isa finer screen and-through it pass the" fi'nes or slack to the bottom levelPfi. The intermediate sizespass along the second deck and through or over the screen If the gate C 'is closed the intermediate grade -is deflected by the baffle E to the side or picking screen's E E The lines again pass through the screens E E and the picked coal passes through or overthe gates E E an'd is deflected back to the lower level B as'by the inwardly'inclined portions E E or with slight modification, to the upper level. It .thenpasses out over the final chuteB either to the conveyor B or to the car X, to which it maybe loaded by any suitable means. lVhile this picked, gradedcoalx may be passed through the entire screen system and to the end track or conveyor, it'may also be dropped to cars at intermed1ate'p0ints: If the gates C and are bothdeftbpen, the graded coal passes, before picking, through the chute B to the car Xi, together with the slack; Through the gates E and IE it may. be passed down the chutes A and A to the car X or X The slack may similarly be discharged either at the end track or conveyor or to the intermediate tracks, through opening or closing of the gates B ,'B* and B The lump. coal bigger than 3 inch, orthe' size of the upper screen D may be dropped through the gates D C and B directly. to the chute B andthe car X or itmay pass over the gate D when closed, and down the incline D to the second level I). The gate D furnishes means for dropping it through to the car X and if that gate is closed it runs over the incline D and thus to the conveyor 13 and the car X.

It will thus be clear that to the first track car X either slack alone may be passed, or egg and slack, or run-of-the-mine, viz: all three grades. To the second car X slack alone may be passed, or picked egg alone, or picked egg and slack, or picked run-ofthe-mine. To the car X may befed picked egg, picked 1;}; inch lump, picked 3 inch lump, picked run-of-the-mine, or slack. And a similar choice is open for feed to" the last car*X.

Any suitable means, not herein shown, may be provided to support the pickers which pick the coal as it passes"alongthe various screens. The large or l'inch lump may be picked directly into the section-l at" the refuse trough. The branches l1 and if take care of the picking troughs E and I? over which "passes the coal intermediate the 3 inch lump and the slack, and the section 5 conveys away the refuse picked from the various screens.

I claim:

1. A reciprocatingscreen comprising a central section and a plurality of sidesections separate therefrom and adapted to be supplied with material therefrom.

2. A plural level reciprocating 3 screen comprising a central section and a plurality of side sections separate therefrom and adapted to receive material from an upper level of the screen and to return it to a lower level of said screen.

A plural level reciprocating screen comprising a central section and a plurality of side sections separate therefrom and adapted to receive material from one level of the screen and to return it to another level of said screen.

4. A reciprocating screen comprising a central section and a plurality of side sections separate therefrom and adapted to receive material therefrom, and a refuse trough adjacent and substantially parallel with each of said side sections. I

5. A reciprocating screen comprising a supplied with material therefrom", and a branched refuse trough one branch of which is adjacent and substantially. parallel; with each of said side sections.

6. A- reciprocating screen having a plurality of levels, a pickingtrough adjacent thereto and adapted to receive material from one level of the screen and-deliver it to another level thereof.

7. A reciprocating screen having a plurality of levels, a picking trough adjacent thereto and adapted to receive material from one level of the screen and deliver it to another level thereof, and a screen sur face intermediate the ends of said picking trough.

8. A reciprocating screen having a plurality of levels, a picking trough adjacent thereto and adapted to receive material from one level of the screen and deliver it to another level thereof, and a delivery chute and gate therefor intermediate the ends of the picking trough.

9. A. reciprocating screenhaving a plurality of levels, a picking trough adjacent thereto and adapted to receive material from one level of the screen and deliver it to another level thereof, a screen surface intermediate the ends of said picking trough, and a delivery chute and gate therefor inter mediate the ends of the picking trough.

10. A reciprocating screen assembly com prising upper and lower elements reciprocating in opposition to each other, adjacent picking troughs adapted to receive material from the upper element and deliver it to the lower element.

11. A reciprocating screen assembly com prising upper and lower elements reciprocating in opposition to each other, and adj acent picking troughs adapted to receive ma terial from the upper element and deliver it to the lower element, said troughs being mounted upon and reciprocating with said lower element.

12. In a reciprocating screen, an upper level and a lower level and adjacent picking troughs, and means for diverting material conveyed along the lower level to said picking troughs, and adjacent means for lowering the material conveyed along the upper level to the lower level.

13. In a reciprocating screen, an upper level and a lower level and adjacent picking troughs, and means for diverting material conveyed along the lower level to said picking troughs, and adjacent means for lowering the material conveyed along the upper level to the lower level comprising a battle across said lower level. and a chute acent and beyond said ballle.

14:. In a reciprocating screen, an upper level and a lower level and adjacent picking troughs, and means for diverting material conveyed along the lower level to said picking troughs, adjacent means for lowering the material conveyed along the upper level to the lower level, and aligned screens of varying mesh in said levels.

15. In a reciprocating screen, an upper level and a lower level and adjacent picking troughs, and means for diverting material conveyed along the lower level to said picking troughs, adjacent means for lowering the material conveyed along the upper level to the lower level, and aligned screens of varying mesh in said levels, together with aligned gates in said levels and means for openin and closing them independently.

l6. reciprocating screen assembly comprising upper and lower elements reciprocating in opposition to each other, the lower element comprising a substantially continuous conveying surface, a plurality of gates therein, and means for opening and closing them independently, the upper element comprising a plurality of: screening levels and gates therein in line with the gates in the lower element.

17. A reciprocating screen assembly comprising upper and lower elements reciproeating in opposition to each other, the lower element comprising a substantially continuous conveying surface, a plurality of gates therein and means for opening and closing them independently, said upper element comprising a lower level and a screen at one end thereof and gates in line with the gates of thelower level, a baflie, and conveying means adapted to receive the material deflected by said battle, an upper level overlying said lower level and adapted to deliver said material to said lower level beyond said ball'le.

18. A reciprocating screen assembly comprising upper and lower elements reciprocating in opposition. to each other, the lower element comprising a substantially continuous conveying surface, a plurality of gates therein and means for opening and closing them independently, said upper element comprising a lower level and a screen at one end thereof and gates in line with the gates of the lower level, a battle, conveying means adapted to receive the material deflected by said bal'lle, an upper level overlying said lower level and adapted to deliver said material to said lower level beyond said ballle, a screen in the upper level overlying the screen in the lower, and gates in the upper level overlying the gates in the lower.

19. A reciprocating screen assembly comprising upper and lower elements reciprocating in opposition to each other, the lower clement comprising a substantially contin uous conveying surface, a plurality of gates therein and means for opening and closing them independently, said upper element comprising a lower level and a screen at one end thereof and gates in line with the gates of the lower level, a battle, and conveying means adapted to receive the material deflected by said balile, comprising a picking trough substantially parallel with said lower element and reciprocating therewith.

20. A reciprocating screen assembly comprising upper and lower elements reciprocating in opposition to each other, the lower element comprising a substantially continous conveying surface, a plurality of gates therein and means for opening and closing them independently, said upper element comprising fit-"iOWGldVl and screen atone end thereof and gates in-line-With thegates of the lower-level, a bafli'e, conveying means adapted to receive the materialdeflectedby said baffle, comprising a picking trough substantially parallel with said lower element and reehprocating therewith, and a screen surface intermediate the ends of such trough.

21. A. reciprocating screen comprising-V a central section and a phn'ahty of separate side sections adapted to receive material therefrom and tometnvn it to-thecent1-rai section.-

22'. A. reciprocatingscreen comprising); a central section and separate side sections adapted to receive material. deflected from the central. section and adapted to deliver the material back tothe centraL section.

Signed at Pittsburgh,- county of (Allegheny-and State of Pennsylvania;- this 16th day of February, 1922;

RQBERT \VILLIAM J().T-1NS(.)N. 

